Then, we introduce six value-added services, including calling SMS receipt, SMS Signature, called SMS receipt, SMS filtering, SMS storehouse as well as SMS transfer.

In order to solve the problem of big vector dimension and semantic repetition,this article gives an introduction of our extended semantic method to an information filtering system of dynamic massive text information sources.

The paper analyzes interrelated problem about information filtering system and user profile,probes into the methods of user profile about filtering system based on VSM,puts forward general models according to continuously interactive between filtering system and user to form a series of phase user profile.

The user modeling technique is one of the most important task in constructing the information filtering system.

Realization of filter system based on large umber of text information;

By using suitable material and structure of the filter core and improving the filter system, the polluted degree of the hydraulic oil is lower than 9NAS.

In order to purify dirty water returned from refining and casting process and to realize circulating utilization of water, VD dirty loop filtering system was established for treating waste water.

As the major economical and technical indexes in WPA production,sulfuric acid consumption is reduced alone with the decrease in the loss of the water soluble P2O5 in the WPA filtering system.